Honing and stropping apparatus for two-edged razor blades



Sept. l; 1925.`

A A. DREYER lI'IONING AND STROIPING'- APPARATUS IOR TWO-EDGED RAZOR BLADES 2 VSheets-Shut 1 Sept. l, 1925.

` A. DREYER HONING AND STROPPING APPARATUS FOR TWO-EDGED RAZOR BLADES Filed Ju Panarea S|5"'1,'1925.

UNITED STATES PATE-NT oFFl-CE.

ALBERT pmu, or Looms, SWITZERLAND.

rioimve Ann smorrme APPARATUS roB-rwo-nneiin aAzoa nLAnm.

Appuamn ma my a, 192s.' sermijto. 650,495.

ing and stropping double-edged safety razor blades and is distinguished by the features that a blade holder which' can swing around a stationary axle supported in a framelike casing is arranged between two honing or stropplng bodies which are shiftable in said casing in opposite directions and trans'- versely with respect to the blade and in mutual dependency,and that said holder' is positively connected with these 'bodies in such a manner that both faces of each cuttin edge of the blade are honed or stroppe whilst the said bodies are reciprocated the blade holder being suitably 'oscillated, as more fully-described hereinafter in connection with the drawings. Means. are provided to rr'eglatein asimpIemanner-the gljidin pressure according to the requirement w ilst the grinding proceeds.

Two constructionalfexamples of my inproved razor lblade sharpening device are illustrated in the accompanying-'drawing in which Figure '1 is a 1an thereof, ypartly in horizontal section; igure 2 is a longitudinal section on line A-A of Figure 1; 'Figure 3 is another such section on line B-B thereof; Figure 4 is a cross section drawn on a larger scale; Figure 5 is aside view of thef-blade-carrier; Figure 6 is a plan ofthe second example, partly in horizontal f section; Figure 7 is a 'longitudinal section on line A-A of Figure 6; Figure 8 is another such'sectionl on line BB also of Figure 6; Figure 9 is a third longitudinal section through Figure 6, on line C-C thereof; Fi res 10, 11 and 12 are details which are fu y dealtwith hereinafter.

Referring to Figures 1-5', the casin is composed of the two longitudinal mem rs a a which are .channel-shaped bin cross secmembers b tion (Fig. .4 l, 'and of the two frontal or end frame members a a by screws, rivets, 0,or in :mayY other suitable manner. he open sldes of the frame members a a which face each other are partly closed by fiat bars d d' extending longitudinally through said members' and being spaced at their upper and lower edge from theadjacent horizontal parts of the fsaid members so as to-form uide passages :for lugs f f firmly connecte with two` lides e e', o which one isi atthe ato ofthe frame or casing the other at the Bottom thereof, but which are shorter than 'the frame or 'casing (Figs. 2 and 4). Thesel slides areguided also at the opposite'surfaces by'nges ea forming partsof the slides, the flanges of the-upper slide extending downwards, those of the lower'slide'vbeing directedupwards, as illustrated in Figure '4.5

. The'slides e e serve as carriers'for the honing or stropping bodies'z. h', which are which are connected with theA attached to plates i "pres'sed against ad ditional flanges `Il: k lWhichrprojectinwards fromthe yflanges e3 of said slides,`the presl sure being exerted by fiat springs y', as shown in 'Figure 4. The honing and stropping bodies t'h can thus yield counter to the pressure of said springs@ The bodies h 11, .'are'connected with each other by two endless bands or cords or wires m m housed in the channels of the side members la a of the casing.v Eachband or by lugsm where there are inserted 'coiled springs o holding the cord or w1re tight.

Referrin to Figure 3, the wire .m is, practically, divided into a short piece and a long one, the short piece commencing at the upper lug m (lefthand end of the ligure), running over the roll n4 and terminatm at the lower lug m (righthand end of the gure) the long wire piece commences at this latter lug, runs over the adjacent roll n1, back to the centre roll o' over which it passes in the contrary direction, then to the rlghthand roll n, the wire parts between the roll o and the roll 'n1 crossing, each other, as shown in vFigure 4. The wire then runs over the righthand roll nz and `ts finally back to the lug m at the lefthan end of the casing. l

The blade holder which is a flat member as shown in the centre part of Figure 2 (in 'cross section) is provided with some hooklike pins s intended to extend through the knownapertures s2 of the blade s.

The manner of operation of the device is as follows:

The slide e which is provided with a projecting part e2 forming a grip is shifted in the direction indicated by the arrow 1 to the right, and simultaneously therewith the slide e is shifted in the direction indicated by the arrow 2 to the left, the slide e being moved in this direction by the slide e by reason of the connection of the slides by the wire parts and the rolls, as above described. But when the shifting commences,

also the'roll o is rotated, and consequently the blade holder p with the blade s are turned, viz, from the position I shown in Figure 2 in dotted lines into the position II shown 'in this ligure in'full lines, the blade being so turned that the upper face of the lefthand cutting edge bears against the honing body h and the lowerv face of the righthand edge bears against the honing body h', astshown in full lines. The strength of this pressure under which thehoning is effected corresponds to the friction arising between the roll o and the piece of wire etcggliding alongover or around it and the time of the honing procedure is determined by the duration of the motion of the honing bodies h 11.', or of the slides e e respectively, the honing path in the respective direction being finished when each slide has arrived at the end of its guide way in the frame or casing. Having arrived in this position, the slides with the honin bodies are shifted rearwards into their gormer position, viz, that shown in Figure 2, but at the commencement of this rearward motion, also the roll o is rotated, so that the blade is turned from the position shown in full lines (Fig. 2) into that shown in dotted lines, in which 'the other two faces of the two edges are honed,as will now be clear without entering into further details.l

The blade is honed by a suicient number of reci rocations'I of the slides with the honing homies b means of the grip e. Instead of honing odies proper, that is to Say', grinding bodies, stropping`v bpdies may be Yemployed which strop the already-ground or honed blade. The finished blade is removed. from the holder p by shifting it olf the hooklike pins p so that these may pass through theapertures s? of the blade.

Instead of transmitting the motion from one slide to the other, and to the blade holder axle, by rolls and wires, racks and pinions may be employed as is the casein the modification illustrated in Figures l-lO.-

The slides, the means for uiding them, the manner of supporting t e honing or stropping bodies in the slides, all this is practically just so as in Figures 14. The same is true of the manner of, and means for, attaching the blade to the blade holder.

The blade holder axle forms at its ends pivots p which extend through the inner rails d d and carry each a sleeve u having a flange u. Each sleeve supports a pinion t which is loosely rotatable -thereon and meshes with another pinion t carried by a pivot m, Figs. 6 and 8. The axial length of the pinion t is greater than the axial length of the pinions t', and each meshes with two racksv y and y which form arts of the slides e and e', or are secure thereto respectively. It is obvious that the slide e (with its honing or stropping body) can be reciprocated by reciprocating the slide e (with its honing or stropping body) by means of the grip e2, the motion of the slide e being' transmitted to the slide e by means of the pinions t which' are driven by the racks y and drive the racks y. The reciprocations are, however, transmitted also to the blade holder axle,y for which'pur ose knob-like projections lv v are rovided w ich are locate in apertures of t e longitudinal frame parts, a w in the axial direction of the blade holder axle. Each knob v is attached to a fiat spring fw. by which it is pressed against the hub of the adjacent pinion t which in its turn, is pressed against the flange u ofthe sleeve u which, as has been described, is'secured tothe pivots of the blade holder axle. Thel rotation o-f the pinions t is, thus, transmitted to the blade holder with its blade under the friction produced by the springs w, of which there is, of course, one on either ,side of the apparatus. The same friction determines the rstrength with which the blade faces are pressed. against the honing or stroppin bodies whilst these bodies are reciprocate There are also in this case all four facesf the blade sharpened, exactly as already described in connection with Figures 1-15.

Owing to the buttons v being accessible from the outer side of the apparatus, they may be pressed in the direction towards 'one another, i. against the cog-wheels t', whereby the friction` between the buttons and said wheels, as well as between these and the sleeve flanges u', may be increased or decreased, and, consequently, also the pressure with which the blade faces are laid against the honing 'or stropping bodles may be varied or adjusted, as required or desired.

It has been foundsuitable to the purpose to make the ends of the lateral rims .of the slides form lugs, as shown at k2 in Fig-s2 and 5, in such a manner, that the cutting vedges ,never contact with the additional dinal frame members b (Figs. 6, 7, 9 and 12) is provided with a plate d2 having a semi-circular recess d3 which receives one of the pivots p of the blade carrier axle.

Owing to theplate d2 being made oblique in the manner illustrated in Figures 10 and 12, it is rendered possible to shift the blade on its holderin order to attach it thereto and detach .it therefrom, and, besides, the blade is prevented from unintentional shifting during the honing or stropping by the inwardly directed wall of the plate.

The honing or stropping bodies may also be made in the manner shown in Figure 11, in which each body consists of a grinding or honing part 11,3 and of a stropping part h2, the blade being, thus, acted on by both parts consecutively, as well as alternately, whilst said bodies are reciprocated.

I claim:

. A honing and stropping device for double edge razor blades comprising a frame consisting of a pair of channel-shaped side members, a blade holder journalled Within said side members, a pair of hone supporting bodies, lugs carried by said bodies andv guided Within said channel-shaped side members, means arranged Within said channel-shaped side members for operatively connecting said hone supporting bodies and blade holder whereby upon longitudinal movement o f said hone supporting bodies,

said blade holder Will be caused to oscillate therebetween, andthe opposite edges of the blade carried by the holder will be simultaneously and alternately honed.

In Witness whereof I have hereunto setmy hand.

ALBERT DREYER. 

